Revert "Closes: #66"

This reverts commit c3be29255a.

Co-authored-by: Roberto Abdelkader Martínez Pérez <robertomartinezp@gmail.com>

spec/test/features/control/append/error_malformed.feature

@@ -28,4 +28,4 @@ Feature: Kapow! server reject append requests with malformed JSON bodies.
       Hi! I am an invalid JSON document.
       """
     Then I get 400 as response code
-#      And I get "Malformed JSON" as response reason phrase
+      And I get "Malformed JSON" as response reason phrase

spec/test/features/control/append/error_unprocessable.feature

@@ -31,7 +31,7 @@ Feature: Kapow! server rejects requests with semantic errors.
       }
       """
     Then I get 422 as response code
-#      And I get "Invalid Route" as response reason phrase
+      And I get "Invalid Route" as response reason phrase
 
   Scenario: Error because bad route format.
     If a request contains an invalid expression in the
@@ -48,4 +48,4 @@ Feature: Kapow! server rejects requests with semantic errors.
       }
       """
     Then I get 422 as response code
-#      And I get "Invalid Route" as response reason phrase
+      And I get "Invalid Route" as response reason phrase

spec/test/features/control/append/success.feature

@@ -33,7 +33,7 @@ Feature: Append new routes in Kapow! server.
       }
       """
     Then I get 201 as response code
-#      And I get "Created" as response reason phrase
+      And I get "Created" as response reason phrase
       And I get the following response body:
       """
       {
@@ -64,7 +64,7 @@ Feature: Append new routes in Kapow! server.
       }
       """
     Then I get 201 as response code
-#      And I get "Created" as response reason phrase
+      And I get "Created" as response reason phrase
       And I get the following response body:
       """
       {